HOSA DENTAL SCIENCE FINAL PAPER 2026
QUESTIONS WITH ANSWERS GRADED A+
◉ Explorers. Answer: to examine teeth for decay
1.Orban
2.Pigtail
3.Shepherds Hook
◉ Cotton Forceps. Answer: to grasp or transfer items
◉ Instrument Handles. Answer: small round 1/4, standard hollow 5/16,
lightweight 3/8, satin steel
◉ Basic Tray Setup. Answer: Mouth Mirror
Pigtail Explorer
Cotton Forceps
◉ Parts of an Instrument. Answer: Handle
Shank
Working End
,◉ Three-Number Instrument. Answer:
◉ Four-Number Instrument. Answer:
◉ Enamel Hatchet. Answer: to clean and smooth walls in cavity prep; to
remove enamel not supported by dentin
*push motion*
◉ Enamel Hoe. Answer: to clean and smooth floor and walls in cavity
prep
*pulling motion*
◉ Straight Chisel. Answer: to plane and cleave enamel in cavity prep.
*push motion*
◉ Wedelstaedt Chisel. Answer: to plane and cleave enamel in cavity
prep/curved blade
*push motion*
◉ Binangle Chisel. Answer: to plane and cleave enamel in cavity prep/2
angles in shank
*push motion*
,◉ Angle Former. Answer: to make lines and points of angles clearer and
to clean out tooth for cavity prep.
◉ Gingival Margin Trimmer: Mesial and Distal. Answer: to bevel
cervical walls of mesial and distal retention areas
◉ Spoon Excavators. Answer: to remove carious dentin
◉ Spoon Excavators secondary functions. Answer: to remove temporary
crowns/temporary cement/ permanent crown during try-in
◉ Anesthetic Aspirating Syringe. Answer: to administer a local
anesthetic
◉ Short Needle. Answer: to administer an anesthetic by injection on
maxillary arch
◉ Long needle. Answer: to administer anesthetic by block injection to
mandibular arch
◉ Anesthetic Cartridge. Answer: to hold liquid anesthetic for local
anesthetic injection
, ◉ Anesthetic Cartridge/Blister Packs. Answer: to hold liquid anesthetic:
varied
◉ Recapping Device. Answer: to hold needle sheath for one-hand
recapping
◉ Computer-Controlled Local Anesthetic Delivery System. Answer: to
improve ergonomics and precision of anesthetic delivery
◉ Nitrous Oxide and Analgesic Tanks. Answer: to relax patients for
dental procedures
◉ Nitrous Oxide Nose Mask. Answer: to evacuate excess nitrous oxide
◉ Nitrous Oxide and Oxygen Flowmeter. Answer: to monitor N2O and
O2 that is given to patient
◉ Local Anesthetic Syringe Tray Setup. Answer: Anesthetic Aspirating
Syringe
Long Needle
Short Needle
Anesthetic Cartridge
Needle Stick Protector
Topical Anesthetic
QUESTIONS WITH ANSWERS GRADED A+
◉ Explorers. Answer: to examine teeth for decay
1.Orban
2.Pigtail
3.Shepherds Hook
◉ Cotton Forceps. Answer: to grasp or transfer items
◉ Instrument Handles. Answer: small round 1/4, standard hollow 5/16,
lightweight 3/8, satin steel
◉ Basic Tray Setup. Answer: Mouth Mirror
Pigtail Explorer
Cotton Forceps
◉ Parts of an Instrument. Answer: Handle
Shank
Working End
,◉ Three-Number Instrument. Answer:
◉ Four-Number Instrument. Answer:
◉ Enamel Hatchet. Answer: to clean and smooth walls in cavity prep; to
remove enamel not supported by dentin
*push motion*
◉ Enamel Hoe. Answer: to clean and smooth floor and walls in cavity
prep
*pulling motion*
◉ Straight Chisel. Answer: to plane and cleave enamel in cavity prep.
*push motion*
◉ Wedelstaedt Chisel. Answer: to plane and cleave enamel in cavity
prep/curved blade
*push motion*
◉ Binangle Chisel. Answer: to plane and cleave enamel in cavity prep/2
angles in shank
*push motion*
,◉ Angle Former. Answer: to make lines and points of angles clearer and
to clean out tooth for cavity prep.
◉ Gingival Margin Trimmer: Mesial and Distal. Answer: to bevel
cervical walls of mesial and distal retention areas
◉ Spoon Excavators. Answer: to remove carious dentin
◉ Spoon Excavators secondary functions. Answer: to remove temporary
crowns/temporary cement/ permanent crown during try-in
◉ Anesthetic Aspirating Syringe. Answer: to administer a local
anesthetic
◉ Short Needle. Answer: to administer an anesthetic by injection on
maxillary arch
◉ Long needle. Answer: to administer anesthetic by block injection to
mandibular arch
◉ Anesthetic Cartridge. Answer: to hold liquid anesthetic for local
anesthetic injection
, ◉ Anesthetic Cartridge/Blister Packs. Answer: to hold liquid anesthetic:
varied
◉ Recapping Device. Answer: to hold needle sheath for one-hand
recapping
◉ Computer-Controlled Local Anesthetic Delivery System. Answer: to
improve ergonomics and precision of anesthetic delivery
◉ Nitrous Oxide and Analgesic Tanks. Answer: to relax patients for
dental procedures
◉ Nitrous Oxide Nose Mask. Answer: to evacuate excess nitrous oxide
◉ Nitrous Oxide and Oxygen Flowmeter. Answer: to monitor N2O and
O2 that is given to patient
◉ Local Anesthetic Syringe Tray Setup. Answer: Anesthetic Aspirating
Syringe
Long Needle
Short Needle
Anesthetic Cartridge
Needle Stick Protector
Topical Anesthetic
